And what Carson stated pyramids might have been used for matters because?
Because it speaks to his judgement and critical thinking ability.
And that matters a great deal.
It's amazing this actually has to be explained to you and the others.
Exactly, it's his reasoning process. He verges into wingnut territory despite over 100 years of historical research, because the historical record is at odds with his reading of Joseph and the Bible. And with his creationist views, he does the same thing. It's not so much Darwinism, because Darwin himself said he had deep moral misgivings about what his theory's effect would be for the notion of a loving God: would God resort to such pain and death to achieve his desired end? So, any Christian should have difficulty resolving that apparent conflict.
But that's not what Carson does. Rather, he has constructed a fantasy of circular reasoning. He first begins by saying evolution is evidence of the arrogance “that they are so smart that if they can’t explain how God did something, then it didn’t happen, which of course means that they’re God. You don’t need a God if you consider yourself capable of explaining everything.” - See more at:
Ben Carson: Evolution Is An Absurd Myth, 'Give Me A Break'
And the fact is Darwin certainly did not consider himself, or his theory, as "explaining everything," or not necessarily showing a creator does not exist
But Carson doesn't stop there. He goes on to say that of course species may change within species so "God doesn't have to start all over every 50 years." But, because we can't line up every fossil showing the step by step evolution from single cell to inter-species evolution ... "where are the fossil remains?"
Ben Carson: I Will Believe in Evolution When They Show Me the Fossils—No, YOU'VE Never Been to a Museum
So, to achieve his religious myth, first he has to mischaracterize a scientific theory, then accept the theory in part where it is irrefutable, and then dismiss it entirely ... not on a scientific basis, but because there's no chain of fossils.
In short, he is not a rational person.